StockCIK 1500412
Ambiq Micro, Inc. (AMBQ): Insider Trades and Fund Holdings
In the past 12 months, Ambiq Micro, Inc. insiders reported 0 open-market purchases worth $0 and 22 sales worth $22.1M; 15 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$22.1MSold by insiders, 12 months
1Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 16, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 16 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $772K |
| Oct 16 | Scott McLean HansonCTO | ▼ SELL10b5-1 | $357K |
| Oct 16 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $255K |
| Oct 6 | Fumihide EsakaCEO | ▼ SELL | $1.15M |
| Oct 6 | Scott McLean HansonCTO | ▼ SELL | $604K |
| Oct 6 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $548K |
| Oct 6 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $404K |
| Oct 6 | Jeffrey G. WinzelerCFO | ▼ SELL | $380K |
| Sep 17 | Scott McLean HansonCTO | ▼ SELL10b5-1 | $422K |
| Sep 15 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $3.17M |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
All 22 AMBQ insider trades →Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Sean Chihhsiang Chen | COO | 0 | $0 | 5 | $3.48M |
| Scott McLean Hanson | CTO | 0 | $0 | 6 | $5.12M |
| Fumihide Esaka | CEO | 0 | $0 | 8 | $12.4M |
| Jeffrey G. Winzeler | CFO | 0 | $0 | 1 | $380K |
| Ker Zhang | Director | 0 | $0 | 2 | $645K |
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Tracked funds that report AMBQ
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 214,756 | $19.0M | ▲ +404.1% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →